Finding the Fourth Proportional to 56,928.56, 78,557.36 and 31,430.81

Step by Step Solution

1. Step 1: Write the proportion equation
   56,928.56 : 78,557.36 = 31,430.81 : x
2. Step 2: Convert to fraction form
   56,928.56/78,557.36 = 31,430.81/x
3. Step 3: Cross multiply
   56,928.56x = 78,557.36 × 31,430.81
4. Step 4: Simplify right side
   56,928.56x = 2,469,120,906.32
5. Step 5: Solve for x
   x = 2,469,120,906.32/56,928.56
6. Step 6: Final answer
   x = 43,372.27